Amber Portwood has confirmed she's expecting her second child.

The 27-year-old Teen Mom OG star, who is already mom to eight-year-old daughter Leah with her ex-fiance Gary Shirley, is definitely pregnant with her new boyfriend Andrew Glennon's baby.

"When I first found out, I was a little scared," Amber told Us Weekly. "I just kind of sat down and thought about it and realized that it was a big step in my life and it was a good thing actually, and I was really happy within 30 minutes."

Amber and Andrew, a cinematographer, made their red carpet debut together in August 2017 at the MTV Video Music Awards in Los Angeles.

The pair reportedly met while Amber was filming Marriage Boot Camp with her latest ex-fiance, Matt Baier. Andrew apparently worked on the WE tv show and contacted the reality TV star once production on the series wrapped.

"After the initial shock," Amber continued of her pregnancy, "it was nothing but happy thoughts and just enjoying my time with my boyfriend. We're both very happy."

Amber revealed the big news on Friday, November 3, and many of her Teen Mom co-stars expressed their happiness almost immediately afterward.

Catelynn Baltierra wrote on Twitter, "Congratulations babe I love you and can't wait to see you at Friendsgiving," while her husband, Tyler Baltierra, tweeted, "CONGRATS AMB! We are so happy for you & can't wait to meet that little baby!"

Teen Mom 2 star Briana DeJesus wrote, "Congrats, hope it's a boy! Lol" and then Kailyn Lowry and Leah Messer also congratulated her on social media.

"Thank you everyone for all the kind words," Amber replied on Friday to all the Twitter posts. "I'm very excited for my future with Andrew and our little family we are starting together! Love."

Reports Amber is pregnant began circulating last week.

"Amber has been feeling sick lately," a source told Us at the time. "But she's really, really happy!"

The MTV star, who first found fame when she appeared on an episode of 16 & Pregnant in 2009, revealed on Season 6 of Teen Mom OG earlier this year that having more children wasn't in her plan due to her medications for borderline personality disorder and bipolar disorder.
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However, Amber stopped taking the medications about three months ago, according to the magazine.

"I wanted to see if I was just unhappy because of the things that were going on in my life at the time with him, and I realized after weaning myself off that I actually am okay," she said.

"It's manageable as long as you have a healthy lifestyle and healthy people around you."